Today's Message Index:
----------------------
1. 05:58 AM - Engine Hesitation (rveighta@comcast.net)
2. 06:59 AM - Re: Engine Hesitation (Kelly McMullen)
3. 07:16 AM - Re: Engine Hesitation (Ralph E. Capen)
4. 07:21 AM - Re: Engine Hesitation (Mike Robertson)
5. 08:39 AM - Denver area Hangar Space for Rent (L Klingmuller)
6. 09:44 AM - Re: Engine Hesitation (RICHARD MILLER)
7. 01:15 PM - Re: Engine Hesitation (rveighta@comcast.net)
8. 01:44 PM - Re: Engine Hesitation (rveighta@comcast.net)
9. 02:54 PM - Re: Engine Hesitation (Mike Robertson)
10. 03:17 PM - Re: Engine Hesitation (Neal George)
11. 03:44 PM - Re: Engine Hesitation (Vincent Welch)
12. 04:40 PM - Re: Engine Hesitation (Richard McBride)
13. 05:00 PM - Re: Engine Hesitation (rveighta@comcast.net)
14. 05:34 PM - Re: Waterproofing RV-4's (Paul Besing)
15. 06:59 PM - Re: Engine Hesitation (Vincent Welch)
16. 06:59 PM - Re: Engine Hesitation (Vincent Welch)
17. 07:01 PM - Initial Baffle-To-Top-Cowling Fit... (Matt Dralle)
18. 07:22 PM - Re: Engine Hesitation (Bruce Gray)
19. 08:13 PM - Re: Engine Hesitation (Garry)
20. 08:52 PM - Re: Waterproofing RV-4's (Jeff Bertsch)
Message 1
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| Subject: | Engine Hesitation |
I have a Lycoming IO-360 in my RV8A which=C2- exhibits an engine hesitanc
y or "stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight, and in an RPM ra
nge of 750-1300. In flight there is no evidence of a stumble,
and no stumble at initial start up, taxiing out for take off or during run-
up. In other words, the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture, (2) removed and cleaned the
servo finger screen, (3) removed the nozzles and placed them in a cup of ac
etone, which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled, I test flew the plane and the
stumble was gone. However, a subsequent test flight revealed
that although the engine was running much smoother, an occasional stumble w
as still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks,
Walt Shipley
Message 2
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| Subject: | Re: Engine Hesitation |
This type of troubleshooting forces you back to basics. Air, spark, fuel
in right proportions at right time. When the engine is hot, vapor
bubbles in fuel lines are possible. Tight valve stem to guide
clearance(minor valve sticking) is possible. Coil faults can show up
with heat.
Stumbles are usually a mixture problem, but you don't say if it happens
with or without throttle movement. You don't say what time is on the
engine. My guess is either some fuel boiling in the injector lines or a
valve sticking, preventing sufficient mixture getting into the cylinder.
Have you done a SB188 valve wobble check? Spark problems are less likely
to be at low power and intermittent.
rveighta@comcast.net wrote:
> I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy
> or "stumble" that is proving very difficult to diagnose.
>
> This problem shows up when taxiing back in after a flight, and in an RPM
> range of 750-1300. In flight there is no evidence of a stumble,
>
> and no stumble at initial start up, taxiing out for take off or during
> run-up. In other words, the engine only exhibits this behavior when it
>
> is warm.
>
>
>
> I have talked to some very knowledgable folks and have tried several
> things: (1) Reset the idle mixture, (2) removed and cleaned the
>
> servo finger screen, (3) removed the nozzles and placed them in a cup of
> acetone, which was then placed in a sonic cleaner for about
>
> an hour. After the nozzles were reinstalled, I test flew the plane and
> the stumble was gone. However, a subsequent test flight revealed
>
> that although the engine was running much smoother, an occasional
> stumble was still there.
>
>
>
> Additional facts:
>
>
>
> Oil temps are normal (around 180 deg F)
>
> Compression test is normal (all cylinders mid 70's)
>
> I'm using a Catto 3 blade prop
>
>
>
> Any and all suggestions you may have will be greatly appreciated.
>
>
>
> Thanks,
>
>
>
> Walt Shipley
>
> *
>
>
> *
Message 3
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| Subject: | Re: Engine Hesitation |
Sounds like you may have a minor case of Vapor-Lock. Like others, increasing the
fuel flow makes it go away. Have you tried running your boost pump to see
if that helps? There's been some discussion about this in the archives.
-----Original Message-----
>From: rveighta@comcast.net
>Sent: Sep 14, 2009 8:56 AM
>To: rv-list@matronics.com
>Subject: RV-List: Engine Hesitation
>
>
>I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or "stumble"
that is proving very difficult to diagnose.
>
>This problem shows up when taxiing back in after a flight, and in an RPM range
of 750-1300. In flight there is no evidence of a stumble,
>
>and no stumble at initial start up, taxiing out for take off or during run-up.
In other words, the engine only exhibits this behavior when it
>
>is warm.
>
>
>I have talked to some very knowledgable folks and have tried several things: (1)
Reset the idle mixture, (2) removed and cleaned the
>
>servo finger screen, (3) removed the nozzles and placed them in a cup of acetone,
which was then placed in a sonic cleaner for about
>
>an hour. After the nozzles were reinstalled, I test flew the plane and the stumble
was gone. However, a subsequent test flight revealed
>
>that although the engine was running much smoother, an occasional stumble was
still there.
>
>
>Additional facts:
>
>
>Oil temps are normal (around 180 deg F)
>
>Compression test is normal (all cylinders mid 70's)
>
>I'm using a Catto 3 blade prop
>
>
>Any and all suggestions you may have will be greatly appreciated.
>
>
>Thanks,
>
>
>Walt Shipley
Message 4
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| Subject: | Engine Hesitation |
Walt=2C
have you tried checking for an intake leak. It can cause exactly what you
are talking about.
Mike Robertson
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or
"stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight=2C and in an RPM
range of 750-1300. In flight there is no evidence of a stumble=2C
and no stumble at initial start up=2C taxiing out for take off or during ru
n-up. In other words=2C the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture=2C (2) removed and cleaned the
servo finger screen=2C (3) removed the nozzles and placed them in a cup of
acetone=2C which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled=2C I test flew the plane and th
e stumble was gone. However=2C a subsequent test flight revealed
that although the engine was running much smoother=2C an occasional stumble
was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks=2C
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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3D
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Message 5
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| Subject: | Denver area Hangar Space for Rent |
I have a very nice hangar space for rent at Front Range Airport (FTG). It
is ideal for a second RV or similar plane. FTG is a user-friendly AO whic
h
has low gas prices and no waiting for taxing or takeoffs. Please give me a
call at (303) 984-4469.
Lothar Klingmuller, RV-6A ' 850 hrs.
Message 6
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| Subject: | Re: Engine Hesitation |
walt
kelly is right. a little more info is needed . you need to do 97-3 from start to
finish to check the fuel system. pressures are critical. what are your chts.
rick
--- On Mon, 9/14/09, Kelly McMullen <kellym@aviating.com> wrote:
> From: Kelly McMullen <kellym@aviating.com>
> Subject: Re: RV-List: Engine Hesitation
> To: rv-list@matronics.com
> Date: Monday, September 14, 2009, 6:57 AM
> Kelly McMullen <kellym@aviating.com>
>
> This type of troubleshooting forces you back to basics.
> Air, spark, fuel in right proportions at right time. When
> the engine is hot, vapor bubbles in fuel lines are possible.
> Tight valve stem to guide clearance(minor valve sticking) is
> possible. Coil faults can show up with heat.
> Stumbles are usually a mixture problem, but you don't say
> if it happens with or without throttle movement. You don't
> say what time is on the engine. My guess is either some fuel
> boiling in the injector lines or a valve sticking,
> preventing sufficient mixture getting into the cylinder.
> Have you done a SB188 valve wobble check? Spark problems are
> less likely to be at low power and intermittent.
>
> rveighta@comcast.net
> wrote:
> > I have a Lycoming IO-360 in my RV8A which
> exhibits an engine hesitancy or "stumble" that is proving
> very difficult to diagnose.
> >
> > This problem shows up when taxiing back in after a
> flight, and in an RPM range of 750-1300. In flight there is
> no evidence of a stumble,
> >
> > and no stumble at initial start up, taxiing out for
> take off or during run-up. In other words, the engine only
> exhibits this behavior when it
> >
> > is warm.
> >
> >
> > I have talked to some very knowledgable folks and have
> tried several things: (1) Reset the idle mixture, (2)
> removed and cleaned the
> >
> > servo finger screen, (3) removed the nozzles and
> placed them in a cup of acetone, which was then placed in a
> sonic cleaner for about
> >
> > an hour. After the nozzles were reinstalled, I test
> flew the plane and the stumble was gone. However, a
> subsequent test flight revealed
> >
> > that although the engine was running much smoother, an
> occasional stumble was still there.
> >
> >
> > Additional facts:
> >
> >
> > Oil temps are normal (around 180 deg F)
> >
> > Compression test is normal (all cylinders mid 70's)
> >
> > I'm using a Catto 3 blade prop
> >
> >
> > Any and all suggestions you may have will be greatly
> appreciated.
> >
> >
> > Thanks,
> >
> >
> > Walt Shipley
> >
> > *
> >
> >
> > *
>
> Forum -
> FAQ,
> - MATRONICS WEB FORUMS -
> List Contribution Web Site -
> -Matt
> Dralle, List Admin.
>
>
>
>
Message 7
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| Subject: | Re: Engine Hesitation |
Mike, I'm not sure what you mean by checking for an intake leak. How do you
go about doing that?
Walt
----- Original Message -----
From: "Mike Robertson" <mrobert569@hotmail.com>
Sent: Monday, September 14, 2009 10:21:26 AM GMT -05:00 US/Canada Eastern
Subject: RE: RV-List: Engine Hesitation
Walt,
=C2-
have you tried checking for an intake leak.=C2- It can cause exactly what
you are talking about.
=C2-
Mike Robertson
=C2-
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which=C2- exhibits an engine hesitanc
y or "stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight, and in an RPM ra
nge of 750-1300. In flight there is no evidence of a stumble,
and no stumble at initial start up, taxiing out for take off or during run-
up. In other words, the engine only exhibits this behavior when it
is warm.
=C2-
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture, (2) removed and cleaned the
servo finger screen, (3) removed the nozzles and placed them in a cup of ac
etone, which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled, I test flew the plane and the
stumble was gone. However, a subsequent test flight revealed
that although the engine was running much smoother, an occasional stumble w
as still there.
=C2-
Additional facts:
=C2-
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
=C2-
Any and all suggestions you may have will be greatly appreciated.
=C2-
Thanks,
=C2-
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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Message 8
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| Subject: | Re: Engine Hesitation |
Kelly, you're so right. This kind of problem does force you back to the bas
ics. To give you
a bit more info, the stumble doesn't occur when the throttle is pushed up;
only at a steady
setting.
I have experimented with tie wrapping foam insulation around the injector l
ines from the
flow divider to the cylinders, but a test flight afterward revealed the pro
blem was still there,
so it appears fuel vaporization is not the culprit.
Cylinder head temps are between 250-300 deg F on my Grand Rapids monitor.
Total time on the engine is 750 TTSN and 300 STOH,=C2-=C2-=C2-=C2-
=C2-which included new valves.
I have not done a SB188 valve wobble test.
Thanks,=C2-=C2-=C2-=C2-=C2- Walt
----- Original Message -----
From: "Kelly McMullen" <kellym@aviating.com>
Sent: Monday, September 14, 2009 9:57:54 AM GMT -05:00 US/Canada Eastern
Subject: Re: RV-List: Engine Hesitation
This type of troubleshooting forces you back to basics. Air, spark, fuel
in right proportions at right time. When the engine is hot, vapor
bubbles in fuel lines are possible. Tight valve stem to guide
clearance(minor valve sticking) is possible. Coil faults can show up
with heat.
Stumbles are usually a mixture problem, but you don't say if it happens
with or without throttle movement. You don't say what time is on the
engine. My guess is either some fuel boiling in the injector lines or a
valve sticking, preventing sufficient mixture getting into the cylinder.
Have you done a SB188 valve wobble check? Spark problems are less likely
to be at low power and intermittent.
rveighta@comcast.net wrote:
> I have a Lycoming IO-360 in my RV8A which =C2-exhibits an engine hesita
ncy
> or "stumble" that is proving very difficult to diagnose.
>
> This problem shows up when taxiing back in after a flight, and in an RPM
> range of 750-1300. In flight there is no evidence of a stumble,
>
> and no stumble at initial start up, taxiing out for take off or during
> run-up. In other words, the engine only exhibits this behavior when it
>
> is warm.
>
> =C2-
>
> I have talked to some very knowledgable folks and have tried several
> things: (1) Reset the idle mixture, (2) removed and cleaned the
>
> servo finger screen, (3) removed the nozzles and placed them in a cup of
> acetone, which was then placed in a sonic cleaner for about
>
> an hour. After the nozzles were reinstalled, I test flew the plane and
> the stumble was gone. However, a subsequent test flight revealed
>
> that although the engine was running much smoother, an occasional
> stumble was still there.
>
> =C2-
>
> Additional facts:
>
> =C2-
>
> Oil temps are normal (around 180 deg F)
>
> Compression test is normal (all cylinders mid 70's)
>
> I'm using a Catto 3 blade prop
>
> =C2-
>
> Any and all suggestions you may have will be greatly appreciated.
>
> =C2-
>
> Thanks,
>
> =C2-
>
> Walt Shipley
>
> *
>
>
> *
===========
===========
MS -
===========
e -
=C2- =C2- =C2- =C2- =C2--Matt Dralle, List Admin.
===========
Message 9
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| Subject: | Engine Hesitation |
Walt=2C
Try tightening all the clamps and bolts on the intake system from the oil s
ump to the cylinder head and do a visual check on the rubber connectors for
condition. If everything appears ok then=2C very carefully=2C spray soapy
water on the intake system while the engine is running. You won't see bub
bles because it is sucking but the engine will stumble if it a big leak=2C
or you will see EGT and cylinder head temp changes.
Mike
From: rveighta@comcast.net
Subject: Re: RV-List: Engine Hesitation
Mike=2C I'm not sure what you mean by checking for an intake leak. How do y
ou go about doing that?
Walt
----- Original Message -----
From: "Mike Robertson" <mrobert569@hotmail.com>
Sent: Monday=2C September 14=2C 2009 10:21:26 AM GMT -05:00 US/Canada Easte
rn
Subject: RE: RV-List: Engine Hesitation
Walt=2C
have you tried checking for an intake leak. It can cause exactly what you
are talking about.
Mike Robertson
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or
"stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight=2C and in an RPM
range of 750-1300. In flight there is no evidence of a stumble=2C
and no stumble at initial start up=2C taxiing out for take off or during ru
n-up. In other words=2C the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture=2C (2) removed and cleaned the
servo finger screen=2C (3) removed the nozzles and placed them in a cup of
acetone=2C which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled=2C I test flew the plane and th
e stumble was gone. However=2C a subsequent test flight revealed
that although the engine was running much smoother=2C an occasional stumble
was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks=2C
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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| Subject: | Engine Hesitation |
Safest way is to connect the blower side of your shop vac to the intake
and spray soapy water around all the joints looking for bubbles.
There are more adventurous methods, but they present serious risk to
life and limb
neal
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of
rveighta@comcast.net
Sent: Monday, September 14, 2009 3:05 PM
Subject: Re: RV-List: Engine Hesitation
Mike, I'm not sure what you mean by checking for an intake leak. How do
you go about doing that?
Walt
Message 11
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| Subject: | Engine Hesitation |
Walt=2C
I know that it is off the subject but how did you end up with oil temps in
the 180's? I also have an RV-8A with an IO-360-A1A and a Hartzell constant
speed prop=2C I have one mag and one lightspeed ignition. On a warm day I
will see 205 - 210 in cruise. The only time I see 180 is in the winter.
My oil cooler is located behind #4 on the baffle. It has a 1" C-Channel st
and off and is well sealed to the baffle. I have cleaned up as much as I c
an=2C the baffle seal is good as evidenced by CHT's in the low to mid 300's
. I even cut about two inches off the bottom of the cowl to open up the ex
it a bit. How did you get 180's?????
Vince
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or
"stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight=2C and in an RPM
range of 750-1300. In flight there is no evidence of a stumble=2C
and no stumble at initial start up=2C taxiing out for take off or during ru
n-up. In other words=2C the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture=2C (2) removed and cleaned the
servo finger screen=2C (3) removed the nozzles and placed them in a cup of
acetone=2C which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled=2C I test flew the plane and th
e stumble was gone. However=2C a subsequent test flight revealed
that although the engine was running much smoother=2C an occasional stumble
was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks=2C
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
_________________________________________________________________
Your E-mail and More On-the-Go. Get Windows Live Hotmail Free.
Message 12
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| Subject: | Re: Engine Hesitation |
Vince,
Just as another point of reference, I have an IO360-A3B6D in my -8
with dual Lightspeed. It has a firewall mounted oil cooler (13 row
if I recall). The plenum into the cooler has a butterfly valve.
Without shutting the valve I rarely see temperatures about 200 degrees
unless in a climb on a hot day. It's not uncommon that I have to
close the valve partially to get temps to 180 or above. With the
valve open on a warm day my temps are usually in the 170s.
Rick McBride
On Sep 14, 2009, at 6:28 PM, Vincent Welch wrote:
> Walt,
>
> I know that it is off the subject but how did you end up with oil
> temps in the 180's? I also have an RV-8A with an IO-360-A1A and a
> Hartzell constant speed prop, I have one mag and one lightspeed
> ignition. On a warm day I will see 205 - 210 in cruise. The only
> time I see 180 is in the winter. My oil cooler is located behind #4
> on the baffle. It has a 1" C-Channel stand off and is well sealed
> to the baffle. I have cleaned up as much as I can, the baffle seal
> is good as evidenced by CHT's in the low to mid 300's. I even cut
> about two inches off the bottom of the cowl to open up the exit a
> bit. How did you get 180's?????
>
> Vince
>
> Date: Mon, 14 Sep 2009 12:56:45 +0000
> From: rveighta@comcast.net
> To: rv-list@matronics.com
> Subject: RV-List: Engine Hesitation
>
> I have a Lycoming IO-360 in my RV8A which exhibits an engine
> hesitancy or "stumble" that is proving very difficult to diagnose.
> This problem shows up when taxiing back in after a flight, and in an
> RPM range of 750-1300. In flight there is no evidence of a stumble,
> and no stumble at initial start up, taxiing out for take off or
> during run-up. In other words, the engine only exhibits this
> behavior when it
> is warm.
>
> I have talked to some very knowledgable folks and have tried several
> things: (1) Reset the idle mixture, (2) removed and cleaned the
> servo finger screen, (3) removed the nozzles and placed them in a
> cup of acetone, which was then placed in a sonic cleaner for about
> an hour. After the nozzles were reinstalled, I test flew the plane
> and the stumble was gone. However, a subsequent test flight revealed
> that although the engine was running much smoother, an occasional
> stumble was still there.
>
> Additional facts:
>
> Oil temps are normal (around 180 deg F)
> Compression test is normal (all cylinders mid 70's)
> I'm using a Catto 3 blade prop
>
> Any and all suggestions you may have will be greatly appreciated.
>
> Thanks,
>
> Walt Shipley
>
>
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> ======================
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> ======================
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> ======================
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> =
> 3D
> ======================
>
>
> Your E-mail and More On-the-Go. Get Windows Li/' target='_new'>Sign
> up now.
>
>
Message 13
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| Subject: | Re: Engine Hesitation |
Vince, I too had temps above 200 F on warm days. That was before I installe
d=C2-louvered vents =C2-in the lower cowl. Now I have the reverse probl
em;
hard to get the oil temps up on cold days.
Walt
----- Original Message -----
From: "Vincent Welch" <welchvincent@hotmail.com>
Sent: Monday, September 14, 2009 6:28:47 PM GMT -05:00 US/Canada Eastern
Subject: RE: RV-List: Engine Hesitation
Walt,
=C2-
I know that it is off the subject but how did you end up with oil temps in
the 180's?=C2- I also have an RV-8A with an IO-360-A1A and a Hartzell con
stant speed prop, I have one mag and one lightspeed ignition.=C2- On a wa
rm day I will see 205 - 210 in cruise.=C2- The only time I see 180 is in
the winter.=C2- My oil cooler is located behind #4 on the baffle.=C2- I
t has a 1" C-Channel stand off=C2-and is well sealed to the baffle.=C2-
I have cleaned up as much as I can, the baffle seal is good as evidenced b
y=C2-CHT's in the low to mid 300's.=C2- I even cut about two inches off
the bottom of the cowl to open up the exit a bit.=C2- How did you get 18
0's?????
=C2-
Vince=C2-
=C2-
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which=C2- exhibits an engine hesitanc
y or "stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight, and in an RPM ra
nge of 750-1300. In flight there is no evidence of a stumble,
and no stumble at initial start up, taxiing out for take off or during run-
up. In other words, the engine only exhibits this behavior when it
is warm.
=C2-
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture, (2) removed and cleaned the
servo finger screen, (3) removed the nozzles and placed them in a cup of ac
etone, which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled, I test flew the plane and the
stumble was gone. However, a subsequent test flight revealed
that although the engine was running much smoother, an occasional stumble w
as still there.
=C2-
Additional facts:
=C2-
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
=C2-
Any and all suggestions you may have will be greatly appreciated.
=C2-
Thanks,
=C2-
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
Your E-mail and More On-the-Go. Get Windows Li/' target='_new'>Sign up no
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Message 14
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| Subject: | Re: Waterproofing RV-4's |
Jeff, I had the same problem with mine. What I did was cut off the front of the
fiberglass fairing that laps up on the forward skin. Then I covered the forward
skin, very tightly, with wax paper (or use a mold release as long as it doesn't
hurt the paint.) Then I adjusted the canopy to close very tightly. Glassed
a new fairing on top of the old one, overlapping the front skin in an arc
fashion. Let it cure closed. Then trimmed to fit, and put a seal from Ace
Hardware underneath. Flew IMC quite a bit without any more leaking.
Paul Besing
________________________________
From: Jeff Bertsch <noms1reqd@yahoo.com>
Sent: Sunday, September 13, 2009 9:39:41 PM
Subject: RV-List: Waterproofing RV-4's
My RV-4 can't fly through rain. It leaks terribly the forward edge of the tip
over canopy. I've tried various seals, the latest being a V-shaped seal. Does
anyone know how to really waterproof the RV-4?
Jeff Bertsch
Houston
Message 15
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| Subject: | Engine Hesitation |
Are you using the cowl louvers also Rick?
Vince
From: rick.mcbride@me.com
Subject: Re: RV-List: Engine Hesitation
Vince=2C
Just as another point of reference=2C I have an IO360-A3B6D in my -8 with d
ual Lightspeed. It has a firewall mounted oil cooler (13 row if I recall)
. The plenum into the cooler has a butterfly valve. Without shutting the
valve I rarely see temperatures about 200 degrees unless in a climb on a ho
t day. It's not uncommon that I have to close the valve partially to get t
emps to 180 or above. With the valve open on a warm day my temps are usual
ly in the 170s.
Rick McBride
On Sep 14=2C 2009=2C at 6:28 PM=2C Vincent Welch wrote:
Walt=2C
I know that it is off the subject but how did you end up with oil temps in
the 180's? I also have an RV-8A with an IO-360-A1A and a Hartzell constant
speed prop=2C I have one mag and one lightspeed ignition. On a warm day I
will see 205 - 210 in cruise. The only time I see 180 is in the winter.
My oil cooler is located behind #4 on the baffle. It has a 1" C-Channel st
and off and is well sealed to the baffle. I have cleaned up as much as I c
an=2C the baffle seal is good as evidenced by CHT's in the low to mid 300's
. I even cut about two inches off the bottom of the cowl to open up the ex
it a bit. How did you get 180's?????
Vince
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or
"stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight=2C and in an RPM
range of 750-1300. In flight there is no evidence of a stumble=2C
and no stumble at initial start up=2C taxiing out for take off or during ru
n-up. In other words=2C the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture=2C (2) removed and cleaned the
servo finger screen=2C (3) removed the nozzles and placed them in a cup of
acetone=2C which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled=2C I test flew the plane and th
e stumble was gone. However=2C a subsequent test flight revealed
that although the engine was running much smoother=2C an occasional stumble
was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks=2C
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
Your E-mail and More On-the-Go. Get Windows Li/' target='_new'>Sign up no
w.
href="http://www.matronics.com/Navigator?RV-List">http://www.matronics.co
m/Navigator?RV-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/con
tribution
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Message 16
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| Subject: | Engine Hesitation |
I was looking at the louvers also. I was holding that option as a last res
ort but it looks like I may have to go that way by next summer. Thanks for
the info.
Vince
From: rveighta@comcast.net
Subject: Re: RV-List: Engine Hesitation
Vince=2C I too had temps above 200 F on warm days. That was before I instal
led louvered vents in the lower cowl. Now I have the reverse problem=3B
hard to get the oil temps up on cold days.
Walt
----- Original Message -----
From: "Vincent Welch" <welchvincent@hotmail.com>
Sent: Monday=2C September 14=2C 2009 6:28:47 PM GMT -05:00 US/Canada Easter
n
Subject: RE: RV-List: Engine Hesitation
Walt=2C
I know that it is off the subject but how did you end up with oil temps in
the 180's? I also have an RV-8A with an IO-360-A1A and a Hartzell constant
speed prop=2C I have one mag and one lightspeed ignition. On a warm day I
will see 205 - 210 in cruise. The only time I see 180 is in the winter.
My oil cooler is located behind #4 on the baffle. It has a 1" C-Channel st
and off and is well sealed to the baffle. I have cleaned up as much as I c
an=2C the baffle seal is good as evidenced by CHT's in the low to mid 300's
. I even cut about two inches off the bottom of the cowl to open up the ex
it a bit. How did you get 180's?????
Vince
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy or
"stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight=2C and in an RPM
range of 750-1300. In flight there is no evidence of a stumble=2C
and no stumble at initial start up=2C taxiing out for take off or during ru
n-up. In other words=2C the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several things
: (1) Reset the idle mixture=2C (2) removed and cleaned the
servo finger screen=2C (3) removed the nozzles and placed them in a cup of
acetone=2C which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled=2C I test flew the plane and th
e stumble was gone. However=2C a subsequent test flight revealed
that although the engine was running much smoother=2C an occasional stumble
was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks=2C
Walt Shipley
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
3D
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Message 17
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| Subject: | Initial Baffle-To-Top-Cowling Fit... |
Dear Listers,
The RV-8's cowling done and fits like a glove. I started the baffling last night
and its coming along nicely. The fit on the sides and back are very good considering
the IO-390 installation (and the use of the IO-360 baffle kit). The
front baffling is completely different, however, and I'm slogging through the
custom fitting.
But here's my question. I decided to put the top cowling on top of the baffling
that I've got installed so far and I was shocked that the baffling appears to
be a good 1 to 1.5" too tall!! Is this because of the IO-390 or is that just
where Van's expects you to start in your "cutting-it-down-to-size" phase? That's
a lot of snipping and fitting and snipping and fitting. I was expecting
to have to trim some, but not over a inch...
Also, it looks like the over-sized oil cooler is going to fit nicely on the rear
baffle with only a little "modification". But I'm not sure if the back, upper
corner is going to clear the cowling. Since the cowling is sitting over a
inch high right now, I've got no way to really trial fit the oil cooler and check
for cowling clearance until I trim the baffling down. Worst-case I could
put a blister on the cowling for the rear, upper flange of the oil cooler, I suppose,
but that's kind of hokey. There is room to move the oil cooler in towards
the centerline about 1", but then the mount will no longer line up with the
flange on the outboard edge and will require more modifications.
Thoughts...?
Attached are some pics. ( Digest viewers check http://forums.matronics.com ).
Matt Dralle
RV-8 #82880 N998RV
http://www.mykitlog.com/dralle
Baffling and Oil Cooler...
Message 18
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| Subject: | Engine Hesitation |
He means to check the intake riser seals where they exit the sump. The
easiest way I know, is to spray each riser seal area with engine starter
fluid while the engine is running at low idle. If the engine speeds up,
you have a leak.
Bruce
www.Glasair.org
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of
rveighta@comcast.net
Sent: Monday, September 14, 2009 4:05 PM
Subject: Re: RV-List: Engine Hesitation
Mike, I'm not sure what you mean by checking for an intake leak. How do
you go about doing that?
Walt
----- Original Message -----
From: "Mike Robertson" <mrobert569@hotmail.com>
Sent: Monday, September 14, 2009 10:21:26 AM GMT -05:00 US/Canada
Eastern
Subject: RE: RV-List: Engine Hesitation
Walt,
have you tried checking for an intake leak. It can cause exactly what
you are talking about.
Mike Robertson
_____
From: rveighta@comcast.net
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine hesitancy
or "stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight, and in an RPM
range of 750-1300. In flight there is no evidence of a stumble,
and no stumble at initial start up, taxiing out for take off or during
run-up. In other words, the engine only exhibits this behavior when it
is warm.
I have talked to some very knowledgable folks and have tried several
things: (1) Reset the idle mixture, (2) removed and cleaned the
servo finger screen, (3) removed the nozzles and placed them in a cup of
acetone, which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled, I test flew the plane and
the stumble was gone. However, a subsequent test flight revealed
that although the engine was running much smoother, an occasional
stumble was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks,
Walt Shipley
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Message 19
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| Subject: | Re: Engine Hesitation |
Where can I get info on these "cowl louvers"?
Garry Stout
----- Original Message -----
From: Vincent Welch
To: RV List Matronics
Sent: Monday, September 14, 2009 9:58 PM
Subject: RE: RV-List: Engine Hesitation
Are you using the cowl louvers also Rick?
Vince
-------------------------------------------------------------------------
-----
From: rick.mcbride@me.com
To: rv-list@matronics.com
Subject: Re: RV-List: Engine Hesitation
Date: Mon, 14 Sep 2009 19:30:56 -0400
Vince,
Just as another point of reference, I have an IO360-A3B6D in my -8
with dual Lightspeed. It has a firewall mounted oil cooler (13 row if
I recall). The plenum into the cooler has a butterfly valve. Without
shutting the valve I rarely see temperatures about 200 degrees unless in
a climb on a hot day. It's not uncommon that I have to close the valve
partially to get temps to 180 or above. With the valve open on a warm
day my temps are usually in the 170s.
Rick McBride
On Sep 14, 2009, at 6:28 PM, Vincent Welch wrote:
Walt,
I know that it is off the subject but how did you end up with oil
temps in the 180's? I also have an RV-8A with an IO-360-A1A and a
Hartzell constant speed prop, I have one mag and one lightspeed
ignition. On a warm day I will see 205 - 210 in cruise. The only time
I see 180 is in the winter. My oil cooler is located behind #4 on the
baffle. It has a 1" C-Channel stand off and is well sealed to the
baffle. I have cleaned up as much as I can, the baffle seal is good as
evidenced by CHT's in the low to mid 300's. I even cut about two inches
off the bottom of the cowl to open up the exit a bit. How did you get
180's?????
Vince
-------------------------------------------------------------------------
---
Date: Mon, 14 Sep 2009 12:56:45 +0000
From: rveighta@comcast.net
To: rv-list@matronics.com
Subject: RV-List: Engine Hesitation
I have a Lycoming IO-360 in my RV8A which exhibits an engine
hesitancy or "stumble" that is proving very difficult to diagnose.
This problem shows up when taxiing back in after a flight, and in an
RPM range of 750-1300. In flight there is no evidence of a stumble,
and no stumble at initial start up, taxiing out for take off or
during run-up. In other words, the engine only exhibits this behavior
when it
is warm.
I have talked to some very knowledgable folks and have tried several
things: (1) Reset the idle mixture, (2) removed and cleaned the
servo finger screen, (3) removed the nozzles and placed them in a
cup of acetone, which was then placed in a sonic cleaner for about
an hour. After the nozzles were reinstalled, I test flew the plane
and the stumble was gone. However, a subsequent test flight revealed
that although the engine was running much smoother, an occasional
stumble was still there.
Additional facts:
Oil temps are normal (around 180 deg F)
Compression test is normal (all cylinders mid 70's)
I'm using a Catto 3 blade prop
Any and all suggestions you may have will be greatly appreciated.
Thanks,
Walt Shipley
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3D
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Message 20
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| Subject: | Re: Waterproofing RV-4's |
Thanks Paul.- I don't know if I follow what you did.- Do you have any p
ictures online?
-
Jeff Bertsch
--- On Sun, 9/13/09, Jeff Bertsch <noms1reqd@yahoo.com> wrote:
From: Jeff Bertsch <noms1reqd@yahoo.com>
Subject: RV-List: Waterproofing RV-4's
My RV-4 can't fly through rain.- It leaks terribly the forward edge of th
e tip over canopy.- I've tried various seals, the latest being a V-shaped
seal.- Does anyone know how to really waterproof the RV-4?
-
Jeff Bertsch
Houston
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